Actually, Kobo is listing that name perfectly under N!
The surname "Van Name" sounds Dutch or otherwise related to Dutch. The "Van" is actually officially (originally) written without a capital and is a joint word, meaning "of" or "from". So it's Mark R. from Name. You wouldn't say Mark R. From Name.
Official alphabetising of surnames with joint words is to sort the name with the first letter of the actual surname, so not of the joint word. In this case, the "N."